<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCtiy}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper" v-for="item in hot" :key="item.id">
            <div class="button" @click="handleCityClick(item.name)">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(item, key) in cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div
            class="item border-bottom"
            v-for="innerItem in item"
            :key="innerItem.id"
            @click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCtiy: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
    //  this.$store.commit('changeCity', city)
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        this.scroll.scrollToElement(element)
      }
    }
  },
  // vue实例创建之后执行
  mounted () {
    this.scroll = new BScroll(this.$refs.wrapper)
  }
}

</script>

<style lang="stylus" scoped>
  @import "~styles/varibles.styl"
  .border-topbottom
    &:before
      border-color :#ccc
    &:after
      border-color :#ccc
  .border-bottom
  &:before
    border-color :#ccc
  .list
    position :absolute
    top:1.58rem
    left :0
    bottom :0
    right :0
    overflow :hidden
    .title
      line-height :.54rem
      background :#eee
      padding-right :.2rem
    .button-list
      padding :.1rem .6rem .1rem .1rem
      overflow :hidden
      .button-wrapper
        width :33.33%
        float :left
        .button
          margin: .1rem
          border :.02rem solid #ccc
          text-align :center
          border-radius :.06rem
          padding :.1rem 0
    .item-list
      .item
        line-height :.76rem
        padding-left :.2rem
</style>
